Limekiln.



'Nog 7|2,25|. Patented oct. 2a, |902.

l A. P. BROU'MELL.

LIM EKILN.- (Application med may 2s, 19o2.\ (No Model.) Z'Sheets-SheetI.

/N VEA/Tof? A .Proom eZ Z NrTnD STATES .PATENT OFFICE.Y

ALBERT P. BROOMELL, OF YORK, PENNSYLVANIA.

LIMEKILN.

SPECIFICATION forming part of Letters Patent No. 712,251, dated October28, 1902.

Application tiled May 28,1902. Serial No. 109,303. (No model.)

To all whom it may concern:

Be it known that l, ALBERT P. BRooMELL, residing at York, in the countyof York and State of Pennsylvania, have invented certain new and usefulImprovements in .Limekilns, of which the following is a specification.

This invention relates to improvements in that class of kilns used forroasting lime-rock in the manufacture of lime, cement, and the like, andit primarily seeks to provide a kiln of the character describedespecially designed for burningr lime by producer-gas in a convenient,economical, and effective manner; and in its generic nature my inventioncomprehends a novel construction of kiln, including a steel shell,having a base portion for firmly resting on the ground and having aspecial bottom construction for supporting the upper portions ofthekiln, including its brick and the rock in thecourse of burning.

My invention also includes a special construction of shears ordischarging doors, which constitute the-bottom of the cooler, a meansfor operating the same, and a novel construction of gas-feeding andburner devices, including damper-controlled hot-airfeeding means, andmechanism for conveniently removing rock or other accumulations in theburners to prevent the lime or other material from choking theair-inletsto the burners. Y

In its more subordinate features my invention consists in certain novelldetails of construction and peculiar Acombination of parts, all of whichwill hereinafter be fully described, and specifically pointed out in theappended claims, reference being had to the accompanying drawings, inwhichu Figure 1 is a vertical longitudinal section of my improved kiln,taken practically on the line 1 1 of Fig. 2. Fig. 2 is a horizontalsection of the same on the line 2 2 of Fig. 1. Fig. 3 is an endelevation of the same. Fig. 4 is a transversesection of the upper endthereof, taken on the line 4 4 of Fig. 1.

In the practical construction of my invention the main or body portionis'built of steel, the platform being also of metal. The body portionincludes a shell 1, the outer part 1iL of which extends above theplatform 2 in a cylindrical or other desired shape in cross-section, andthe said shell incases the burningstack or rock-holder, having the usualtirebrick lining 32 and the surrounding masonry body 3b. The entiremasonry structure of my kiln is supported upon the platform-section 2,mounted upon vertical posts 4or stiffeningribs 2a, bolted on the insideto the bottom part of the shell 1, which, as will be readily seen fromthe drawings, forms an air-space surrounding the bottom or cooler end ofthe kiln portion proper, and the said posts 2iL 2 at their upper endshave steel gussets or angle-braces 2b, upon which rests the heavycast-metal plate 2C, that supports the brick and masonry work and uponwhich the steel cooler or conical bot-tom 4 of the kiln-body is fixedlysuspended. The cooler 4, which consists of an inverted cone shapedbottom, riveted or otherwise pendently secured to the plate 2", has itsdischarge controlled by a novel construction of shears ordischargingdoors, the peculiar arrangement of which forms a feature of,my invention. Two opposing doors of shear plates 5 l 5 are provided, andeach door is independently supported upon a pair of hanger-rods 5 5a insuch manner that the said doors can be swung outward from under theldischarge end of the cooler 4, and to provide fora close joint the saiddoors are curved in an arc with the fulcrum of the han-ger-rodsas thecenter, and the bottom edge of thecoolercone is ysuitably shaped toprovide for Athe close-fitting thereagainst of the twoindependently-swingable doors, and for conveniently manipulating thesaid doors at Will to open or close the discharge end of the coolerpartially or whollyT each door has rack portions 5" 5b for coperatingwith the pinions 5c 5c on the hand-Wheelequipped actuating-rods 51 5, asclearly shown in the drawings.

By providing a closure means for the cooler operatable in the mannerdescribed an easilyworking, convenient, and positive actuating means isproduced for controlling the cooler.

In the practical constructionmykiln may be equipped with one or morefurnaces. In the drawings I have shown two oppositelydisposed furnaces,which communicate with the cated by F) are of a slim arched shape andconstructed of special fire-brick, especially at lthe sides,v center,and top of the iiues f, and

stack or kiln body. These furnaces (indi-y IOO the brick or masonry workis suitably braced by the truss or cross rods f', that connect with thesegmental shell-plates f2, as best shown in Figs. 3 and 4.

The furnaces (see Fig. l) are supported on the laterally extendedplatform sections, which include the metal platesp p, mounted on I-beamsp p', riveted at their inner ends to the posts 2 and supported at theirouter ends on the vertical I-beamsp2p2, and the ue j' of each furnaceincludes a vertical portion f3, that extends in a plane below the fuelor feed openingf4 to form a pocketf5, the reason for which willpresently appear. Each furnace is also provided with an air-inlet f6 inthe nature of a channel built in the brickwork, that communicates withthe flue part f3 and with an opening 2d in the cast-metal plate thatsupports the main or central brick structure and which opening 2dcommunicates with the air-space in the lower end of the shell-pocketthat surrounds the cooler. Each air-opening 2d is controlled by adamper2O to regulate the amount of air admitted into the furnace, and toprovide for conveniently operating the said dampers each damper has achain or cable 2Oa connected therewith reaching to the platform in frontof the furnace.

By having the inlet communicating with the air-space surrounding thecooler it is manifest that hot air is taken from around the cooling-coneand delivered hot into the combustion-chamber, and hence the chillingaction of ordinaryatmosphere is avoided,an d, furthermore, by reason ofits contact with the hot brick as it passes to the combustionchamber theair is superheated.

When burning lime there is always more or less rock that falls throughthe furnaceflues into the ring-chamber, which can be removed from timeto time as it accumulates. In my invention I provide a special meanscapable of being easily manipulated and adapted to positively providefor the removal of the accumulations. For this purpose the pockets f5are provided. In the bottom of each of said pockets is a brick partitionf7, having inclined sides, (see Fig. 4,) and these partitions extenddirectly across the bottom of the fines. The partitions f7 also extendup about flush with the bottom of the air-inlets ofthe said flue. Thepurpose of the center partitions is to deflect the lime or rock thatfalls back into the iiues to the bottom of the pocket f7 onto the doorsg g under said pockets, which are held to slide in the guides g g',secured to the under side of the platform portions that support thefurnaces, and are operatable in any well-known manner, whereby each timethe lime is drawn from the coolercone the said slides g can be opened topermit any lime accumulations in the pocket to also drop into thereceiving-car or floor below. Each furnace is also provided with twopeep-holes h h, through which the operation of the re can be noticed andthrough which the lime-burner7 can watch the rock as it 'maaar passesdown in front of the fines. These peep-holes can also be utilized forpermitting of the insertion of a bar into the flues and the limestone orin case the lime becomes bridged or choked.

Each furnace has a gas-inlet 30 disposed at the opposite side from theair-inlet, and the said inlets have their discharging-mouth 80L flaredlaterally in order that the flame may be distributed all over thecombustionchamber and into the fines. With each inlet is connected agas-supply pipe which com municates with the gas-main, in practiceconnected with a producer or other means of supply, and while I have notshown it in the drawings it is manifest that one or more kilns may beoperated from a central gassupply. The amount of gas delivered into eachfurnace is regulated by a damper 30X in the gas-pipe, as shown.

From the foregoing, taken in connection with the accompanyingdrawings,itis thought that the manner in which my kiln operates and themanner of its construction will be readily understood by those skilledin the art to which it appertains.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

l. In a kiln of the character stated, a stack, a cooler, pendentlyjoined with the lower end thereof, a metallic shell surrounding thestack and the cooler and extending to the ground, a furnace connectedwith the stack by a flue, said line extending through the shell,substantially as shown and for the purposes described.

2. In a kiln of the character stated, a stack, a cooler pendently joinedwith the lower end thereof,a metallic shell surrounding the stack andthe cooler and extending to the ground, and forming a supporting memberfor the stack and furnaces, a furnace connected with the stack by aiiue, and an air-inlet opening into the flue and communicating with thespace between the shell and the cooler, as set forth.

3. In a kiln of the character stated, astack, a cooler pendently joinedwith the lower end thereof,a metallic shell surrounding the cooler andextending to the floor or ground, aseries of furnaces radiating from thestack, each furnace having a flue communicating with the stack at apoint above the cooler, and an air-inlet which opens into the spacebetween the shell and the upper end of the cooler, and a separate valvefor each inlet for controlling that end of the inlet that opens into theshellspace, as specified.

lOO

IIO

L1. In a kiln of the character described, a l

metallic supporting-platform, astack mounted thereon, a cooler pendentlysupported on the platform,said cooler forming the discharge end of thestack, a metallic shell surrounding the cooler and forming a centralsupport forV the platform, and a series of furnaces mounted upon theplatform, said furnaces each in cluding a iiue discharging into thestack at a point above the cooler, as set forth.

5. In a kiln of the character stated, a supporting-platform, a stackmounted thereon, a furnace projected radially from the stack,andsupported upon the platform, said furnace including a ue discharginginto the stack, a valve-controlled air-inlet, and a fuel-feeddischarging into the furnace-Hue, said furnaceflue having a pocket in aplane below the air and the fuel inlets, and a slidable bottom for thesaid pockets, substantially as shown and described.

6. In a kiln of the character stated,the combination with the stack; ofa furnace projected radially from the stack, said furnace including aflue discharging into the stack, said iiue having a pendent portion, thelower end of which forms a pocket, a slidable bottom for the pocket, abridge portion projected centrall'y upward from the bottom of thepocket, a valved air-inlet, and a fuel-inlet,- the said air and fuelinlets having their discharges at a point above the bridge in thepocket, for the purposes described.

7. An improvement for the purposes stated, comprising a metallicsupporting base, including a platform, a stack centrally supported uponthe platform, a metallic shell surrounding the stack, said shellincluding a portion extended below the platform to the ground, a coolerpendently supported from the central platform, said-cooler formingthebottom of the stack and held within the lower metallic shell portion, aseries of furnaces livadiating from the stack supported uporI theplatform, each furnace including a flue-'discharging into the stack, andhaving a pendent portion discharging through the platform', a gate forcontrolling the platform discharge to the flue, a valve-controlledair-inlet communicating with the space between the cooler and themetallic shell, and discharging into the flue, a fuel-supply for eachfurnace including a feed-pipe arranged to discharge into the flue at apoint above the air-inlet for the said iiue, substantially as shown.

8. In a kiln of the character described, the combination with theconical cooler; of a pair of opposing closure members for the dischargeend of the cooler, and forming the bottom thereof, means for supportingthe said doors to swing outwardly to andfrom each other, each of thedoors having a rack, said means including a pair oflpendent hangers foreach door pivotally connected at their upper end to the cooler-body, andan operating-rod for each door having a pinion for engaging the rack,substantially as shown and described.

ALBERT P. BROOMELL.

Witnesses:

BERTHA H. GOODMAN, WILLIAM J. KUNTZ.

